On Wednesday 24 June 2009 12:29:05 Rajeev Kumar wrote:
> my system configuration is Intel Xeon Dual core processor X5260
> 3.33Ghz with following cpu frequency related BIOS options:
>
> acpi support(yes/no)
> C1 Enhanced Mode(enabled/disabled)
> Intel EIST Support(disabled/(GV1/GV3 only)/C states only/Enabled)
>
> I tried to enable cpu frequency scaling on Suse Linux Enterprise
> Server 10 service pack 2 .
>
> #uname -r
> 2.6.16.60-0.21-smp
>
> # ls /lib/modules/2.6.16.60-0.21-smp/kernel/arch/x86_64/kernel/cpufreq/
> acpi-cpufreq.ko powernow-k8.ko speedstep-centrino.ko
>
> #ls /lib/modules/2.6.16.60-0.21-smp/kernel/drivers/cpufreq/:
> cpufreq_conservative.ko cpufreq_ondemand.ko cpufreq_powersave.ko
> cpufreq_stats.ko cpufreq_userspace.ko freq_table.ko
>
> when i tried to enable acpi-cpufreq the following error came.
>
> # modprobe acpi-cpufreq
> FATAL: Error inserting acpi_cpufreq
> (/lib/modules/2.6.16.60-0.21-smp/kernel/arch
> /x86_64/kernel/cpufreq/acpi-cpufreq.ko): No such device
>
> i changed the related BIOS options but nothing happened.
>
>
>
> Then i tried same thing on fedora-11
>
> #uname -r
> 2.6.29.4-167.fc11.x86_64
>
> #ls /lib/modules/$(uname -r)/kernel/drivers/cpufreq/ \
> /lib/modules/$(uname -r)/kernel\
> /arch/*/kernel/cpu/cpufreq/
>
> acpi-cpufreq.ko p4-clockmod.ko powernow-k8.ko speedstep-lib.ko
>
> cpufreq_conservative.ko cpufreq_powersave.ko freq_table.ko
> cpufreq_ondemand.ko cpufreq_stats.ko
>
>
> i succeed in enabling acpi-cpufreq (however when i selected acpi=no in
> BIOS) and my /proc/modules looks like this
ACPI is exporting the required cpufreq tables to the kernel/OS (and more).
acpi=no is a workaround for broken BIOSes or kernel bugs. No ACPI, no cpufreq.
Thomas
--
To unsubscribe from this list: send the line "unsubscribe cpufreq" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
